Time filter

Source Type

Munerato M.S.,São Paulo State University | Marques J.A.,São Paulo State University | Caulkett N.A.,University of Calgary | Tomas W.M.,Brazilian Agricultural Research Corporation Embrapa Pantanal | And 4 more authors.
Animal Welfare | Year: 2015

This study evaluated the short-term hormonal and behavioural responses to capture and radio-collarfitting in free-ranging pampas deer (Ozotoceros bezoarticus). Twenty adult deer (eleven females and nine males) were captured in the South Pantanal wetland (Brazil) and equipped with VHFradio-collars(marked deer). Untreated adult deer of the same sex were randomly chosen as the control group (nine females and nine males). On the day following capture, an observer followed all deer for faecal collection and behaviour evaluation. Faecal samples were immediately refrigerated and frozen at -20°C (within a maximum of 12 h. Faecal glucocorticoid metabolites (FGM) were measured using an II-oxoaetiocholanolone enzyme immunoassay. A qualitative behaviour assessment and the consequences of capture were evaluated using pre-defined terminologies and scores. Flightdistance was recorded using a range finder. FGM increased from 19-22 h after capture onwards and peak concentrations were five times (median) higher as the respective baseline values. FGM values of marked deer were significantly higher at 22-25 and 25-28 h compared with controls. Marked male but not female deer had significantly higher FGMvalues at 22-25 and 25-28 h compared with their baseline values. Marked deer were significantly more fearful, less sociable and defensive than controls. The absences of significant increases of FGM in the captured female deer may indicate that females are less prone to capture stress. The significantly more fearful, and less sociable and defensive patterns observed in marked deer may be relevant during capture of lactating females or in areas with high predator pressure. © 2015 Universities Federation for Animal Welfare.

Macedo G.G.,Federal University of Mato Grosso do Sul | Zuccari C.E.S.N.,Federal University of Mato Grosso do Sul | de Abreu U.G.P.,Brazilian Agricultural Research Corporation EMBRAPA Pantanal | Negrao J.A.,University of Sao Paulo | da Costa e Silva E.V.,Federal University of Mato Grosso do Sul
Tropical Animal Health and Production | Year: 2011

This study investigated the effect of human-animal interaction (HAI) and the stress response on the quality of embryo production in superovulated Nelore (Bos indicus) cattle, under tropical conditions. Thirty-two females underwent a superovulation protocol for 5 days. Cortisol concentrations were determined in blood plasma collected on days 0, 4, and 5. Artificial insemination was performed on days 4 and 5, and nonsurgical embryo flushing on day 11. Embryo production and viability were determined. Human stimulation, animal behaviors, accidents, and handling time were recorded to assess HAI. Cattle age was negatively correlated with accidents, frequency of aversive behaviors, and negative stimuli by stockperson during transit through corral compartments to receive superovulation treatments. The factor analysis revealed two distinct groups. The first group was called stressed and had higher cortisol concentration than the nonstressed group, 16.0 ± 2.1 and 12.5 ± 1.0 ng/mL, respectively. Comparisons between these groups showed that the frequency of voice emissions by the stockperson and the number of accidents were higher in the stressed group, and also, the mean handling time was longer in the stressed group than for the nonstressed. As a result, viability rate of the embryos was 19% lower in the stressed group (P < 0.05). This indicates that intensive negative HAI is likely related to stress, which affects embryo production in a superovulation program. © 2011 Springer Science+Business Media B.V.

Loading Brazilian Agricultural Research Corporation Embrapa Pantanal collaborators
Loading Brazilian Agricultural Research Corporation Embrapa Pantanal collaborators